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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin issued at 04:02 HKT 14/Aug/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 96 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.
The Thunderstorm Warning has been issued. It will remain effective until 6:00 a.m. today. Squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 27 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 26 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 26 degrees.

Between 2:45 and 3:45 a.m., the rainfall recorded in various regions were:

Tai Po 0 to 15 mm;
Yuen Long 3 to 14 mm;
North District 1 to 13 mm;
Tuen Mun 0 to 13 mm;
Tsuen Wan 0 to 7 mm;
Sha Tin 0 to 3 mm;
Central & Western District 0 to 1 mm;
Sham Shui Po 0 to 1 mm;
Sai Kung 0 to 1 mm;
Kwai Tsing 0 to 1 mm;
Islands District 0 to 1 mm;
Wong Tai Sin 0 to 1 mm.

Here is the information on Tropical Storm Bebinca:
Location: 20.6 degrees north, 113.6 degrees east; Maximum sustained wind near its centre: 85 km/h.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 14 Aug


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 03:45 HKT 14/Aug/2018

Here is the latest weather bulletin issued by the Hong Kong Observatory.

Weather forecast for today

Mainly cloudy with occasional squally showers and thunderstorms. Showers will be heavier at times. Temperatures will range between 26 and 30 degrees. Moderate to fresh east to southeasterly winds, occasionally strong offshore and on high ground. There will be rough seas and swells.

Outlook : There will still be squally showers and thunderstorms on Wednesday. Showers will ease off in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 14/08/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)



MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 13/Aug/2018

STORM WARNING AREA: KWANGTUNG.
GALE WARNING AREA: PARACEL.

GENERAL SITUATION AT 130900 UTC:
FOR DETAILS ON TROPICAL STORM BEBINCA (1816), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 131300 UTC:

HONG KONG= E TO SE 5-6, OCNL 7. DOWN TO 1000 M IN HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2-3 M. TEMP 26-30 C. =
KWANGTUNG= CYCLONIC 8-9, BEC UP TO 10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, BEC 10 M. SWELL S TO SW 2-3 M. =
TAIWAN STRAIT= S TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
BASHI= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M. =
PRATAS= S TO SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M. =
BALINTANG= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M. =
SCARBOROUGH= SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3-4 M. =
PARACEL= SW 6-7, 8-9 IN N. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6-8 M IN N. SWELL SW 3-4 M. =
TONKIN= W TO SW 5-6. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
DANANG= W TO SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S TO SW 2-3 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.



SOUTH CHINA COASTAL WATERS
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South China Coastal Waters

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Bulletin issued at 03:30 HKT 14/Aug/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 14 August 2018

Warnings:
Storm force winds in south of Hong Kong and Shangchuan Dao. Strong winds in Hong Kong adjacent waters, Nan'ao and Shanwei.

Weather Situation:
At 3 a.m., Tropical Storm Bebinca with maximum sustained winds of about 85 kilometres per hour near its centre was located near 20.6 degrees north, 113.6 degrees east. It is forecast to move slowly, lingering around the seas to the south of the Pearl River Estuary.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East to southeast force 5 to 6, occasionally force 7.
Heavy squally showers and thunderstorms.
Rough seas.

Nan'ao:
South force 5 to 6.
Occasional squally showers and thunderstorms.
Rough seas.

Shanwei:
South force 6 to 7.
Heavy squally showers and thunderstorms.
Rough seas.

South of Hong Kong:
Cyclonic force 8 to 9, becoming south up to force 10.
Frequent heavy squally showers and thunderstorms.
Very rough to high seas.

Shangchuan Dao:
West to southwest force 8 to 9, becoming cyclonic up to force 10.
Frequent heavy squally showers and thunderstorms.
Very rough to high seas.

Outlook for the next 48 hours
Southerly winds of force 6 to 7, cyclonic winds of force 9 to 10 in west. Frequent heavy squally showers and thunderstorms.

Latest reports from south China coastal weather stations
--------------------------------------------------------

Waglan Island Wind east force 2
  Visibility 29 Kilometres

Shantou Wind northeast force 2
  Visibility 30 Kilometres

Dongsha Wind south-southwest force 4
  Visibility 10 Kilometres

Huangmaozhou Wind southeast force 4

Macau Wind northeast force 3
  Visibility 7 Kilometres

Xisha Wind southwest force 5
  Visibility 9 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 01:30 HKT 14/AUG/2018
(Next update at 9:00-9:30 HKT 14/AUG/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 1 A.M., TROPICAL STORM BEBINCA WAS CENTRED
     NEAR 20.6 DEGREES NORTH 113.5 DEGREES EAST AND
     AND IS FORECAST TO MOVE SLOWLY, LINGERING AROUND
     THE SEAS TO THE SOUTH OF THE PEARL RIVER ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/15-20
                  TEMPO 100/20G30 IN TS
       OFFSHORE:  110/20-25, OCNL 30                   26-29
   B.   2000 FT:  100/20-25, OCNL 30                   24
   C.   5000 FT:  080/25                               21
   D.  10000 FT:  070/20                               13
   E.  18000 FT:  070/15                               MS1
   F.  24000 FT:  100/25                               MS11
   G.  30000 FT:  080/25                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SQUALLY SHOWERS AND
      THUNDERSTORMS. SHOWERS WILL BE HEAVIER AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 800 FT
      SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     FRESH EAST TO SOUTHEASTERLY WINDS, STRONG
     OFFSHORE AND ON HIGH GROUND.  MAINLY CLOUDY WITH
     A FEW SQUALLY SHOWERS AND THUNDERSTORMS. SHOWERS
     WILL BE HEAVIER AT TIMES.=
===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
Aviation Weather Observation and Forecast Information for Hong Kong International Airport
To know more about clouds, please see Commonly observed clouds in Hong Kong.


sigmet
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Significant Weather Information (SIGMET)

The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

The latest significant weather information
issued by the Hong Kong Observatory at 03:35 HKT on 14 Aug 18

VHHK SIGMET 11 VALID 131640/132100 VHHH- VHHK HONG KONG FIR TC BEBINCA PSN N2036 E11318 CB OBS AT 1500Z WI 150NM OF TC CENTRE TOP FL500 INTSF FCST AT 2100Z TC CENTRE PSN N2054 E11324= VHHK SIGMET 13 VALID 131935/140000 VHHH- VHHK HONG KONG FIR TC BEBINCA PSN N2036 E11336 CB OBS AT 1800Z WI 150NM OF TC CENTRE TOP FL500 INTSF FCST AT 0000Z TC CENTRE PSN N2042 E11348=

Please click here for more about the SIGMET


TROPICAL CYCLONE WARNING Skip to main content
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Tropical Cyclone Warnings

Bulletin issued at 03:45 HKT 14/Aug/2018

Tropical Cyclone Warning Bulletin

Here is the latest Tropical Cyclone Warning Bulletin issued by the Hong Kong Observatory.

The Standby Signal, No. 1 is in force.

This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

At 4 a.m., Tropical Storm Bebinca was estimated to be about 200 kilometres south-southwest of Hong Kong (near 20.6 degrees north 113.6 degrees east) and is forecast to move slowly, lingering around the seas to the south of the Pearl River Estuary.

Last revision date: <14 Aug 2018> 

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Last revision date: <14 Aug 2018> 

TROPICAL CYCLONE WARNING FOR SHIPPING
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Tropical Cyclone Warning for Shipping

Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
Current Weather |  Local Weather Forecast |  9-day Weather Forecast
South China Coastal Waters |  Marine Forecast
Severe Weather Information Centre

Bulletin issued at 03:30 HKT 14/Aug/2018


Tropical Cyclone Warning

At 131800 UTC, the tropical storm Bebinca (1816) with central pressure 984 hectopascals was centred within 60 nautical miles of two zero point six degrees north (20.6 N) one one three point six degrees east (113.6 E) and is forecast to be slow moving for the next 24 hours.

Maximum winds near the centre are estimated to be 45 knots.

Radius of over 33 knot winds 30 nautical miles.
Radius of over 2 metre waves 120 nautical miles over southern semicircle, 90 nautical miles elsewhere.

Forecast position and intensity at 141800 UTC
Two one point five degrees north (21.5 N)
One one three point six degrees east (113.6 E)
Maximum winds 50 knots.

Forecast position and intensity at 151800 UTC
Two one point six degrees north (21.6 N)
One one zero point three degrees east (110.3 E)
Maximum winds 40 knots.

Forecast position and intensity at 161800 UTC
Two zero point three degrees north (20.3 N)
One zero five point eight degrees east (105.8 E)
Maximum winds 40 knots.

Forecast position and intensity at 171800 UTC
Dissipated over land.


Bulletin issued at 06:31 HKT 13/Aug/2018


Tropical Cyclone Warning

At 122100 UTC, Tropical Storm Yagi (1814) with central pressure 990 hectopascals was centred within 60 nautical miles of three zero point one degrees north (30.1 N) one two zero point one degrees east (120.1 E) and is forecast to move northwest at about 16 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 40 knots.

Radius of over 33 knot winds 30 nautical miles.
Radius of over 2 metre waves 240 nautical miles.

No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.

Forecast position and intensity at 132100 UTC
Dissipated over land.




The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

Tropical Cyclone Track

YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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Yesterday's Weather and Radiation Level

Bulletin issued at 00:15 HKT 14/Aug/2018
HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     27.3 C
Grass Minimum Temperature                   26.4 C
Relative Humidity                        72 - 92 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          1108.5 mm
Against an average of                     1653.0 mm

Other Stations                Min                  Max
King's Park                  26.9 C               31.6 C
Wong Chuk Hang               25.7 C               31.4 C
Ta Kwu Ling                  25.8 C               32.7 C
Lau Fau Shan                 25.3 C               32.9 C
Tai Po                       26.5 C               30.9 C
Sha Tin                      26.2 C               32.0 C
Tuen Mun                     26.1 C               32.2 C
Tseung Kwan O                26.1 C               31.6 C
Sai Kung                     26.7 C               30.7 C
Cheung Chau                  25.3 C               29.8 C
Chek Lap Kok                 27.1 C               34.4 C
Tsing Yi                     26.2 C               32.5 C
Tsuen Wan Ho Koon            24.9 C               30.0 C
Tsuen Wan Shing Mun Valley   25.5 C               31.4 C
Hong Kong Park               25.6 C               30.7 C
Shau Kei Wan                 25.8 C               30.9 C
Kowloon City                 26.4 C               31.6 C
Happy Valley                 26.3 C               32.7 C
Wong Tai Sin                 25.9 C               31.3 C
Stanley                      25.8 C               30.5 C
Kwun Tong                    26.8 C               30.4 C
Sham Shui Po                 26.5 C               33.3 C
Kai Tak Runway Park          27.3 C               30.5 C
Yuen Long Park               25.2 C               33.4 C
Tai Mei Tuk               26.4 C               31.9 C

Duration of sunshine (King's Park):              7.0 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
 

Yesterday's (13 Aug 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.09
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.13

Note
  1. From readings taken at various locations in Hong Kong in the past, the hourly mean ambient gamma radiation dose rate may vary between 0.06 and 0.3 microsievert per hour. (1 microsievert = 0.000001 sievert = 0.001 millisievert)
  2. Temporal variations are generally caused by changes in meteorological conditions such as rainfall, wind and barometric pressure.
  3. Spatial variations are generally caused by differences in the radioactive content of local rock and soil.
  4. The data displayed is provisional. Only limited data validation has been carried out.
Climatological Information for 13 Aug
Last revision date: <14 Aug 2018> 

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